/Engine/Source/Runtime/InstallBundleManager/Public/InstallBundleSourceInterface.h
Derived classes should implement this if their content install will take a significant amount of time.
virtual [TOptional](API\Runtime\Core\IO\TOptional)< [FInstallBundleSourceProgress](API\Runtime\InstallBundleManager\FInstallBundleSourceProgress) > GetBundleProgress ( [FName](API\Runtime\Core\UObject\FName) BundleName ) const